Pathetic and Unresponsive Service

I received a settlement quote for my MOBI account on 31 July 2026 and the letter stated my settlement amount of R1,121.43 had to be paid by 30 August 2026. I paid the settlement amount on 25 August 2026 with immediate clearance and emailed Finchoice the copy of the settlement quote with my payment on 25th August 2026. I also emailed them on 2 September 2026, as on their App they show my MOBI account is in arrears of R74.00 even though I settled the account. I am not getting any response from them to rectify the error on their side, as my MOBI account is paid up. I also have another account with Finchoice and arranged to pay EFT monthly which I do and I mail them the proof of payments. I requested Finchoice to cancel my debit order several times but they are refusing to cancel the debit order and are causing my account to accumulate additional bank charges, due to the debit order not going though. I am also receiving calls from Finchoice which True Caller shows as being True Finchoice of between 12 and 20 calls a day which constitutes harassment, though Finchoice says it's not their numbers that are calling me.